I want my protagonist to wear a warm coat, something like the image above. The protagonist will be looking for her sister in the first part of the trailer until she finds out she's been kidnapped, then she'll be taking orders from her sisters kidnappers- meaning committing crimes. Criminals tend to wear dark clothes to remain stealthy and low profile.
Jeans are casual and often worn by the protagonist in any genre of film. For my protagonist, really tight jeans would probably be impractical if she's constantly on the move and in damp weather they would restrict her movement, however fitted jeans would look better and allow for more movement.
Doc Martens will be really practical for my character as they are comfortable and wear well in any location. Since my character would be searching for her sister at the start of the trailer, these would be suitable footwear for her.